Shorten the title.

lib/db.dart

@@ -0,0 +1,45 @@
+// https://docs.flutter.dev/cookbook/persistence/sqlite
+
+// SQLite
+import 'dart:async';
+import 'package:flutter/widgets.dart';
+import 'package:flutter_expense_tracker/models/frequency.dart';
+import 'package:path/path.dart';
+import 'package:sqflite/sqflite.dart';
+
+// Local
+import '/models/expense.dart';
+
+void loadDB() async {
+  // Avoid errors caused by flutter upgrade.
+  WidgetsFlutterBinding.ensureInitialized();
+
+  final String frequencies =
+      "'${Frequency.values.map((freq) => freq.title).join("','")}'";
+  print(frequencies);
+
+  // Open the database and store the reference.
+  final database = openDatabase(
+    // Set the path to the database. Note: Using the `join` function from the
+    // `path` package is best practice to ensure the path is correctly
+    // constructed for each platform.
+    join(await getDatabasesPath(), 'expense_tracker.db'),
+
+    onCreate: (db, version) {
+      // Run the CREATE TABLE statement on the database.
+      return db.execute(
+        """
+        CREATE TABLE expense
+          ( id INTEGER PRIMARY KEY
+          , name TEXT
+          , cost DOUBLE
+          , frequency TEXT CHECK(frequency IN ($frequencies) )
+          , description TEXT
+        )""",
+      );
+    },
+    // Set the version. This executes the onCreate function and provides a
+    // path to perform database upgrades and downgrades.
+    version: 1,
+  );
+}

lib/main.dart

@@ -1,15 +1,16 @@
-// Helpful guides:
+// Flutter
-// - https://flutter.dev/docs/cookbook/forms/validation
-
 import 'package:flutter/material.dart';
 
+// Local
 import '/pages/expense.dart';
 import '/pages/income.dart';
 import '/pages/asset.dart';
 import '/pages/report.dart';
 import '/pages/settings.dart';
+import '/db.dart';
 
 void main() {
+  loadDB();
   runApp(const MainApp());
 }
 
@@ -41,6 +42,10 @@ class HomePage extends StatefulWidget {
 class _HomePageState extends State<HomePage> {
   var pageSelected = 0;
 
+  refresh() {
+    setState(() {});
+  }
+
   @override
   Widget build(BuildContext context) {
     Widget page;
@@ -48,7 +53,9 @@ class _HomePageState extends State<HomePage> {
     switch (pageSelected) {
       case 0:
         page = ExpensePage();
-        dialog = ExpenseInputDialog();
+        dialog = ExpenseInputDialog(
+          notifyParent: refresh,
+        );
       case 1:
         page = IncomePage();
       case 2:
@@ -79,11 +86,8 @@ class _HomePageState extends State<HomePage> {
 
     return LayoutBuilder(builder: (context, constraints) {
       return Scaffold(
-        // TODO: Add a drawer instead of nav rail.
+        appBar: AppBar(title: Text("Expense Tracker")),
-        body: Row(
+        drawer: NavigationRail(
-          children: [
-            SafeArea(
-              child: NavigationRail(
           extended: constraints.maxWidth >= 800,
           destinations: [
             NavigationRailDestination(
@@ -100,7 +104,7 @@ class _HomePageState extends State<HomePage> {
             ),
             NavigationRailDestination(
               icon: Icon(Icons.bar_chart),
-                    label: Text('Projections'),
+              label: Text('Reports'),
             ),
             NavigationRailDestination(
               icon: Icon(Icons.settings),
@@ -111,17 +115,13 @@ class _HomePageState extends State<HomePage> {
           onDestinationSelected: (value) {
             setState(() {
               pageSelected = value;
+              Navigator.pop(context);
             });
           },
         ),
-            ),
+        body: Container(
-            Expanded(
-              child: Container(
           color: Theme.of(context).colorScheme.primaryContainer,
-                child: page,
+          child: Center(child: page),
-              ),
-            ),
-          ],
         ),
         floatingActionButton: floatingButton,
       );

lib/pages/expense.dart

@@ -1,5 +1,7 @@
+// Flutter
 import 'package:flutter/material.dart';
 
+// Local
 import '/models/expense.dart';
 import '/models/frequency.dart';
 
@@ -12,7 +14,9 @@ class ExpensePage extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    return ListView.builder(
+    return expenses.isEmpty
+        ? Text("Add expenses to get started!")
+        : ListView.builder(
             itemCount: expenses.length,
             itemBuilder: (_, index) {
               final Expense curr = expenses[index];
@@ -33,27 +37,16 @@ class ExpensePage extends StatelessWidget {
                   ),
                 ),
               );
-        });
+            },
-    /*
-    return ListView(
-      children: [
-        ListTile(
-          title: Text("Fake Item 1"),
-          subtitle: Text("30.00 / month"),
-        ),
-        ListTile(
-          title: Text("Fake Item 2"),
-          subtitle: Text("180.00 / year"),
-        ),
-      ],
           );
-    */
   }
 }
 
 class ExpenseInputDialog extends StatefulWidget {
+  final Function() notifyParent;
   const ExpenseInputDialog({
     super.key,
+    required this.notifyParent,
   });
 
   @override
@@ -70,25 +63,18 @@ class _ExpenseInputDialogState extends State<ExpenseInputDialog> {
 
   @override
   Widget build(BuildContext context) {
-    const inputWidth = 300.0;
-    const inputHeight = 50.0;
-
-    List<DropdownMenuItem> freqValues = [];
-    for (var freq in Frequency.values) {
-      freqValues.add(DropdownMenuItem(value: freq, child: Text(freq.title)));
-    }
-    ;
-
     return AlertDialog(
-      title: Center(child: Text("Add New Expense")),
+      title: Center(
+        child: Text("New Expense"),
+      ),
       content: Form(
         key: _expenseFormKey,
-        autovalidateMode: AutovalidateMode.onUserInteraction,
+        //autovalidateMode: AutovalidateMode.onUserInteraction,
-        child: Column(mainAxisSize: MainAxisSize.min, spacing: 10, children: [
+        child: Column(
-          SizedBox(
+          mainAxisSize: MainAxisSize.min,
-            width: inputWidth,
+          //spacing: 10,
-            height: inputHeight,
+          children: [
-            child: TextFormField(
+            TextFormField(
               keyboardType: TextInputType.text,
               decoration: InputDecoration(
                 labelText: "Name",
@@ -104,11 +90,7 @@ class _ExpenseInputDialogState extends State<ExpenseInputDialog> {
                 _name = newValue!;
               },
             ),
-          ),
+            TextFormField(
-          SizedBox(
-            width: inputWidth,
-            height: inputHeight,
-            child: TextFormField(
               keyboardType: TextInputType.numberWithOptions(decimal: true),
               decoration: InputDecoration(
                   labelText: "Cost", hintText: "Example: 10.00"),
@@ -125,12 +107,10 @@ class _ExpenseInputDialogState extends State<ExpenseInputDialog> {
                 _cost = double.parse(newValue!);
               },
             ),
-          ),
+            DropdownButtonFormField(
-          SizedBox(
+              items: (Frequency.values.map((freq) =>
-            width: inputWidth,
+                      DropdownMenuItem(value: freq, child: Text(freq.title))))
-            height: inputHeight,
+                  .toList(),
-            child: DropdownButtonFormField(
-              items: freqValues,
               decoration: InputDecoration(
                   labelText: "Recurrence", hintText: "Example: Monthly"),
               validator: (value) {
@@ -143,14 +123,10 @@ class _ExpenseInputDialogState extends State<ExpenseInputDialog> {
                 return null;
               },
               onChanged: (newValue) {
-                _freq = newValue;
+                _freq = newValue!;
               },
             ),
-          ),
+            TextFormField(
-          SizedBox(
-            width: inputWidth,
-            height: inputHeight,
-            child: TextFormField(
               keyboardType: TextInputType.text,
               decoration: InputDecoration(
                   labelText: "Description",
@@ -162,20 +138,16 @@ class _ExpenseInputDialogState extends State<ExpenseInputDialog> {
                 _desc = newValue!;
               },
             ),
+          ],
         ),
-        ]),
       ),
       actions: [
-        SizedBox(
+        Row(
-          width: inputWidth,
-          height: inputHeight,
-          child: Row(
           mainAxisAlignment: MainAxisAlignment.spaceEvenly,
           crossAxisAlignment: CrossAxisAlignment.center,
           children: [
             ElevatedButton.icon(
               onPressed: () {
-                  print("TODO: Clear fields!");
                 Navigator.of(context).pop();
               },
               icon: Icon(Icons.cancel),
@@ -183,7 +155,6 @@ class _ExpenseInputDialogState extends State<ExpenseInputDialog> {
             ),
             ElevatedButton.icon(
               onPressed: () {
-                  print("TODO: Save expense!");
                 if (_expenseFormKey.currentState!.validate()) {
                   _expenseFormKey.currentState!.save();
                   setState(() {
@@ -195,10 +166,7 @@ class _ExpenseInputDialogState extends State<ExpenseInputDialog> {
                           description: _desc),
                     );
                   });
-                    print(expenses.toString());
+                  widget.notifyParent();
-                    for (var expense in expenses) {
-                      print(expense.toString());
-                    }
                   Navigator.of(context).pop();
                 }
               },
@@ -206,7 +174,6 @@ class _ExpenseInputDialogState extends State<ExpenseInputDialog> {
               label: Text('Submit'),
             ),
           ],
-          ),
         )
       ],
     );

macos/Flutter/GeneratedPluginRegistrant.swift

@@ -5,6 +5,8 @@
 import FlutterMacOS
 import Foundation
 
+import sqflite_darwin
 
 func RegisterGeneratedPlugins(registry: FlutterPluginRegistry) {
+  SqflitePlugin.register(with: registry.registrar(forPlugin: "SqflitePlugin"))
 }

pubspec.lock

@@ -131,6 +131,22 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.9.0"
+  platform:
+    dependency: transitive
+    description:
+      name: platform
+      sha256: "5d6b1b0036a5f331ebc77c850ebc8506cbc1e9416c27e59b439f917a902a4984"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.1.6"
+  plugin_platform_interface:
+    dependency: transitive
+    description:
+      name: plugin_platform_interface
+      sha256: "4820fbfdb9478b1ebae27888254d445073732dae3d6ea81f0b7e06d5dedc3f02"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.8"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -144,6 +160,46 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.10.0"
+  sqflite:
+    dependency: "direct main"
+    description:
+      name: sqflite
+      sha256: "2d7299468485dca85efeeadf5d38986909c5eb0cd71fd3db2c2f000e6c9454bb"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.1"
+  sqflite_android:
+    dependency: transitive
+    description:
+      name: sqflite_android
+      sha256: "78f489aab276260cdd26676d2169446c7ecd3484bbd5fead4ca14f3ed4dd9ee3"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.0"
+  sqflite_common:
+    dependency: transitive
+    description:
+      name: sqflite_common
+      sha256: "761b9740ecbd4d3e66b8916d784e581861fd3c3553eda85e167bc49fdb68f709"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.5.4+6"
+  sqflite_darwin:
+    dependency: transitive
+    description:
+      name: sqflite_darwin
+      sha256: "22adfd9a2c7d634041e96d6241e6e1c8138ca6817018afc5d443fef91dcefa9c"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.1+1"
+  sqflite_platform_interface:
+    dependency: transitive
+    description:
+      name: sqflite_platform_interface
+      sha256: "8dd4515c7bdcae0a785b0062859336de775e8c65db81ae33dd5445f35be61920"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.0"
   stack_trace:
     dependency: transitive
     description:
@@ -168,6 +224,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.3.0"
+  synchronized:
+    dependency: transitive
+    description:
+      name: synchronized
+      sha256: "69fe30f3a8b04a0be0c15ae6490fc859a78ef4c43ae2dd5e8a623d45bfcf9225"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.3.0+3"
   term_glyph:
     dependency: transitive
     description:
@@ -202,4 +266,4 @@ packages:
     version: "14.3.0"
 sdks:
   dart: ">=3.6.1 <4.0.0"
-  flutter: ">=3.18.0-18.0.pre.54"
+  flutter: ">=3.24.0"

pubspec.yaml

@@ -9,6 +9,7 @@ environment:
 dependencies:
   flutter:
     sdk: flutter
+  sqflite: ^2.4.1
 
 dev_dependencies:
   flutter_test: